1 /*
2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package jdk.internal.module;
26
27 import java.lang.module.ModuleDescriptor;
28 import java.lang.module.ModuleFinder;
29 import java.lang.module.ModuleReference;
30 import java.util.HashSet;
31 import java.util.Set;
32
33 /**
34 * Defines methods to compute the default set of root modules for the unnamed
35 * module.
36 */
37
38 public final class DefaultRoots {
39 private static final String JAVA_SE = "java.se";
40
41 private DefaultRoots() { }
42
43 /**
44 * Returns the default set of root modules for the unnamed module computed from
45 * the system modules observable with the given module finder.
46 */
47 static Set<String> compute(ModuleFinder systemModuleFinder, ModuleFinder finder) {
48 Set<String> roots = new HashSet<>();
49
50 boolean hasJava = false;
51 if (systemModuleFinder.find(JAVA_SE).isPresent()) {
52 if (finder == systemModuleFinder || finder.find(JAVA_SE).isPresent()) {
53 // java.se is a system module
54 hasJava = true;
55 roots.add(JAVA_SE);
56 }
57 }
58
59 for (ModuleReference mref : systemModuleFinder.findAll()) {
60 String mn = mref.descriptor().name();
61 if (hasJava && mn.startsWith("java.")) {
62 // not a root
63 continue;
64 }
65
66 if (ModuleResolution.doNotResolveByDefault(mref)) {
67 // not a root
68 continue;
69 }
70
71 if ((finder == systemModuleFinder || finder.find(mn).isPresent())) {
72 // add as root if exports at least one package to all modules
73 ModuleDescriptor descriptor = mref.descriptor();
74 for (ModuleDescriptor.Exports e : descriptor.exports()) {
75 if (!e.isQualified()) {
76 roots.add(mn);
77 break;
78 }
79 }
80 }
81 }
82
83 return roots;
84 }
85
86 /**
87 * Returns the default set of root modules for the unnamed module from the
88 * modules observable with the given module finder.
89 */
90 public static Set<String> compute(ModuleFinder finder) {
91 return compute(finder, finder);
92 }
93 }
|
1 /*
2 * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.internal.module;
27
28 import java.lang.module.ModuleDescriptor;
29 import java.lang.module.ModuleFinder;
30 import java.lang.module.ModuleReference;
31 import java.util.Set;
32 import java.util.stream.Collectors;
33
34 /**
35 * Defines methods to compute the default set of root modules for the unnamed
36 * module.
37 */
38
39 public final class DefaultRoots {
40 private DefaultRoots() { }
41
42 /**
43 * Returns the default set of root modules for the unnamed module from the
44 * modules observable with the intersection of two module finders.
45 *
46 * The first module finder should be the module finder that finds modules on
47 * the upgrade module path or among the system modules. The second module
48 * finder should be the module finder that finds all modules on the module
49 * path, or a subset of when using --limit-modules.
50 */
51 static Set<String> compute(ModuleFinder finder1, ModuleFinder finder2) {
52 return finder1.findAll().stream()
53 .filter(mref -> !ModuleResolution.doNotResolveByDefault(mref))
54 .map(ModuleReference::descriptor)
55 .filter(descriptor -> finder2.find(descriptor.name()).isPresent()
56 && exportsAPI(descriptor))
57 .map(ModuleDescriptor::name)
58 .collect(Collectors.toSet());
59 }
60
61 /**
62 * Returns the default set of root modules for the unnamed module from the
63 * modules observable with the given module finder.
64 *
65 * This method is used by the jlink system modules plugin.
66 */
67 public static Set<String> compute(ModuleFinder finder) {
68 return compute(finder, finder);
69 }
70
71 /**
72 * Returns true if the given module exports a package to all modules
73 */
74 private static boolean exportsAPI(ModuleDescriptor descriptor) {
75 return descriptor.exports()
76 .stream()
77 .filter(e -> !e.isQualified())
78 .findAny()
79 .isPresent();
80 }
81 }
|